Pattern controlling mechanism for looms



Sept. 5, 1944. A. s. HuTcHlNs 25357470 PATTERN coN'rRoLLINGV MECHANISM FOR LooMs Filed June 4, 1942 2 Sheets-Sheet 1 Sept. 5, 1944. y A. s. HUTcHlNs 2,357,470

' PATTERN coNTRoLLING MECMNISM FOR Looms A l'liled Jude 4, 1942 2 Shegats-Sheet 2 INvEN'rop.

HLLAN f HuT-HNS Patented Sept. 5, 1944 PATTERN CONTROLLING MECHANISM FOR L LOOMS Allan S. Hutchins, Paitbn, Mass., assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application June 4, 1942, serial No. 445,765 1a claims. tot 139-71) This invention relatesv to improvements in patternY mechanism for looms and it is the general object of the invention to provide simple means for temporarily reversing the indications given by a pattern chain to a harness operating mechanism. Y r l In the weaving of certain fabrics such as scarfs, neckerchiefs etc., it is desirable to introduce a marginal cordr thicker than the threads of which the ground of the fabric is formed. If

the cord effect is produced by a single thickthread it is necessary tolower all of the harnesses on the return flight of the shuttle so that but one pick will vremainin the fabric. In my present invention I contemplate laying two successive picks of small size thread in the same shed, the double pick giving the desired corded effect. The double pick is located near or in the border of the fabric and a long harnesschain would be needed if the usual weaving methods were used. It is an important object of my invention to provide a short harness chain to weave the ground part ofthe fabric throughout its length by indicating a regularly repeated sequence, and alter the indication given fory one shed to make it similar to the following shed when the corded effect is desired without stop'r ping or interrupting the feedy of the harness chain.

As an example, the body of the fabric may be woven as a two up and two down twill having diagonal lines across the cloth. The pattern chain will be built to cause the twill weave to run throughout the length of the fabric and will be comparatively short so that it will rotate a number of times between cords or borders. The decorative corded effect will be called whenever desired without regard to the length of the harness chain which produces the twill weave. On that pick in which the first of the pair Aoi" cord forming picks occurs the harnesses will be moved from ,their normal position for that pick to the position which they normally occupy on kthe following pick. When the second pick is reached the previous shed is repeated, thus permitting both cord forming picks to lie in the same shed. This result is accomplished by changing the normal position of certain of the mechanisms between the harness chain and the harnesses. The harness chain continues to move as usual and there will be no interruption or offsetting of .the diagonal stripes extending across the fabric.

It is a more particular object of my presentv invention to utilize the indication of the box motion to reverse the indications given by the pattern chain to a dobby on one ofthe pair of cord forming picks, preferably the first. A loom to which my invention is more particularly applicable will operate with at least two shuttles, one for the ground weave and one for the cord. When the cord is to be woven there will be a shift ofV the shuttle boxes to place the cord carrying shuttle in action and I utilize this shift to eliectthe aforesaid reversal of indications for the harness mechanism.

Dobbies ordinarily operate with knife actuated hooks which are controlled vby fingers the vertical V; position of which is determined by a pattern chain. Each linger controls a hookV and the relation of the parts is such that when a finger is down its corresponding hook is up out of the path of its knife, but when a finger is raised by the pattern chain' the associated hook falls into the knife path. YIt is van important object of my present invention to reverse the positions of cer-V tain of the hooks from the positions which they would otherwise occupy as determined by the pattern mechanism when there is a shift of the shuttle boxes. This reversal vI effect by lifting a linger which is indicated to be down by the patternA chain, and raising a hook which has' been indicated for down position due to therais- I ing of its finger by the pattern chain.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth, Fig. 1 is a front elevation of one end of a loom having my invention applied thereto.

Fig. 2 is an enlarged end elevation looking in reversed, and

gang G of shuttle boxes.

operate with a fewer number of boxes and it will be assumed in the present instance that the top cell I2 carries the shuttle S which weaves the ground of the fabric and that the shuttle box I3 under it is occupied by the shuttle S carrying the cord or decorative weft. 'Ihe shuttle boxes are mounted cna lifter rod I4 connected to a lever I5 by link I6. The bottom shaft I1 of the loom rotates once for every two picks of the loom and has secured thereto a master gear I8 to mesh with a pinion I9 the position of which is determined by a pattern lever 20 shown in Fig. 4. The box operating mechanism may be of the usual construction such as shown for instance in prior patent t Lundgren No. 1,760,950.

The lay reciprocates backwardly and forwardly in the usual manner and has a picker stick 2l at each end thereof, one picker stick only being shown in the drawings. The shuttles are picked approximately at top center when the lay is midway between its backward and forward positions and moving rearwardly and the shuttles pass through awarp shed determined in the present instance by harness frames 22, 23, 24 and 25, respectively. In the present instance I illustrate my invention in connection with a twill fabric which can be woven with four harnesses, but I do not wish to be limited to such a loom nor to a specific number of harness frames set yforth herein.

The loom is provided with a dobby designated generally at D having a rocking shaft 30 provided with front and back levers 3| and 32, respectively. Top and bottom lifter knives 33 and 34, respectively, reciprocate in opposite directions in the usual manner. The bottom knife for instance has a working stroke on one pick of the loom toward the left as viewed in Fi-g. l while the top knife has an idle or return stroke, and on the next pick of the loom the top knife has a working stroke while the bottom knife has a return stroke. Harness frames 22, 23, 24 and 25 are connected to harness jacks 35, 36, 31 and 38, respectively, each provided with a jack lever 40 having top and bottom lifter hooks 4| and 42, re-

spectively. These hooks normally tend to fall into the path of their respective knives but can be vraised out vof the knife paths to remain idle on working strokes of the knives.

The dobby is provided with a set of pattern indicated and hook controlling fingers F 4mounted on a pivot pin 45 andr extending over a pattern cylinder 46 around which extends a pattern chain 41. 49 which are arranged according to the pattern to be woven. The dobby in the present instance operates on the double index principle, that is, the cylinder 46 is given a step bystep movement at two-pick intervals, and the pegs which arrive in Vindicating position under the fingers F raise the latter, while those fingers which extend over blank parts of the pattern chain remain in their normal down position. The fingers are of two general types, one set having a lifting arm 50 to have direct engagement with the lower hooks 42 and the other type I having a horizontal arm 52 for engagement with a lifter wire 53 for the top hooks 4I. The ngers of the two types alternate with each other, and are arranged in pairs, one of each type per pair, and each pair being for the hooks of a lever 40.

The loom is provided with a box chain 60 mounted on' a cylinder 6I secured to a shaft 62. The box chain is given a step by step movement The chain is formed with bars 48 having pegs every secondupick of the loom, or may be controlled by the customary multiplier mechanisms generally used with box chains. In order to simplify the description of my invention I have omitted the multiplier and have assumed that the pattern chain moves on alternate picks to present its bars 63 successively under the box lever 20. The latter is connected by rod 65 to a controller 66 for the pinion I9. When the lever 2U is down the pinion I9 will be out of meshing position with respect to the master gear I 8 and the gang G will be in low position with shuttle box I2 and shuttle S active. When the lever 20 is raised, however, the mechanism illustrated at the bottom of Fig. 1 operates to move the pinion I9 into meshing position with respect to the master gear and the latter operates in the usual time of the loom cycle through lever I5, link I6, and lifter rod I4 to raise the gang G to place cell I3 and shuttle S with the cord weft in active position.

The pattern chain 41 has its pegs arranged as shown diagrammatically in Fig. 5 wherein four Vertical columns 10, 1I, 12 and 13 of the chain bars correspond respectively to the jacks 35, 36, 31 and 38 and harness frames 22, 23, 24 and 25. Fig. 5 shows four bars 48 at I, II, III and IV. A new bar 48 on the pattern chain will move to indicating position underthe fingers F preferably at the beginning of each working stroke of the bottom knife 34, and theupper horizontal row of each bar is for the first pick and the lower row for the second pick. In Fig. 5 the pegs 49 are represented at X, and it will be seen in reading down each of the columns 1U to 13 that pairs of Xs alternate with pairs of blanks, and that the Xs are arranged diagonally so that as the bars arrive under the fingers F the indications given by the pegs move progressively, pick by pick, to the left. The pattern chain shown in Fig. 5 is a very common construction and causes the harness frames to rise in pairs successively and rearwardly to produce the usual twill weave.

The length of the chain 48 is not necessarily determined by the length of the box chain 6U nor are its bars necessarily a multiple of the number of bars in chain 60. The twill weave can as a matter of fact be made by a very short chain 48 which continues to feed at two-pick intervals throughout the weaving of the fabric, twelve barsvbeing shown for six repeats of the two up and two down pattern repeat.

The matter thus far described is of usual construction in box dobby looms and operates in the usual manner. During the weaving of the plain part of the fabric box I2 and shuttle S will be active due to blank bars 63 on the chain 60 and the chain 48 will feed regularly at two pick intervals to produce the sequence of harness shiftings necessary to produce a twill weave.

In carrying my present invention into effect I provide means for interrupting the normal shifting of the harnesses on those picks during which shuttle box I3 is active for the purpose of forming two successive identical warp sheds. In the usual running of the loom the harness frames would shift every pick, but inasmuch as it is desirable that both picks of the corded weft which are laid when shuttle S is active shall lie in the same shed, this normal sequence is interrupted for one pick.

In order that the interruption may be effected I secure a lifter 15 to rod 65 under a lug 16 secured to and projecting from a shaft 11 shown/ in Figs. 3 and 4. A small llug 80 turning with shaft 11 nes to the right tra second 111g sl se-' cured to another shaft 82 below shaft 11. These last named shafts may be mounted for rotation on bracket 83 carried by the 'framework of the loom. Under normal conditions the shafts 11 and 82 and their respective lugs are in the position shown in Fig. 3 due to the fact that box' lever 20 is in down position. When these shafts areV in their usual position the indications given' by the pattern chain 48 to the fingers F proceed as suggested in Fig. 5. The dobby'iingers are designated generally at F, but the fingers for the lower hooks are designated at F', F2, F3 and F4, respectively.

Assuming that the decorative stripe is to be woven when bar III of Fig. is in indicating position under fingers F, the top row of bar III will have pegs 86 and 81 in front and back co1- umns 1D and 13, respectively, with front and rear blanks 88 and 89, respectively. The bottom row has blanks in columns and 1I, and pegs in columns 12 and 13. The indication given by chain 48 would normally requirethat front and back harnesses 22 and 25, respectively, be raised due to the fact that fingers F and F4 are elevated by pegs and lower their corresponding bottom hooks, while harnesses 23 and 24 would be down since fingers F2 and F3 are down and hold their corresponding bottom hooks in raised position.

Instead of permitting the first pick corresponding to bar III to proceed as usual, however, I ef.. fect a reversal of the indications given by the pattern chain 48 for harnesses 22 and 24 and in effect cause the indication to be the same as that' given by the lower row of bar III. This reversal requires that the dropping of bottom hook for finger F be canceled as well as the raising of the hook of finger F3. This result I accomplish by the mechanism shown in Figs. 3,.6'and 7. O-n the pick inquestion the parts would be as shown in Fig. 3 if the interruption did not occur, but when lever 20 rises to call cell I3 to active position shaft 11 turns to the right in the direction of arrow a, Fig. 3, and by reason of the lugs 80 and 8|, the shaft 82fhas a left oscillation in the direction of arrow b, so that the parts are as shown in Fig. '1.

Shaft 11 has secured thereto a small arm 90 connected to a link 9| pivoted as at 92 to the finger F3. Rocking of shaft 11 as described has the effect of lifting the end of finger F3 over-l hanging the pattern chain as though a peg were under it and the corresponding hook 423 therefore falls to be in the path of its knife. At the same time a second short arm 95 secured to shaft 82 raises a rod 96 which extends upwardly under hook 42 which was indicated to be down by'peg 86. As the rod 96 rises its hook 42 is lifted outv of the path of knife 34. In this way the posi-4 tions of hooks 42 and 423 are caused to be the opposite of the positions which they would normally occupy during the usual movement of chain 41y and this change is due to shifting of' box cell I3 to active position. During the altered V pick the parts are in the position shown in dotted lines in Figs. 6 and 7 but after bar III moves from indicating'position coincident with return of shuttle S to action, the shafts 11 and 82 return to their positions of Fig. 3.

It will be seen from Fig. 5 that this 'reversal of the indications ordinarily given'by peg 86V and blank 89 duplicates the condition which is normally created by the second or lower row of bar III, and during the second pick of the loom the harness frames remain in the position to which they had been moved when the normal sequence was interrupted. Two successive identical sheds are thereforeformed for the two ights of shuttle S.

It is customary when laying two picks of weft in the same shed to employ some form of catch mechanism Yat the side of the loom opposite the gang G to hold the first pick when the shuttle returns for the second pick. This catch may take the form of pins, or selvage harness warps, selvage cordsgbut since such devices are well known I have noty illustrated them herein.

In the foregoing description I have set forth my invention in connection with a twill Weave, and have shown mechanism for raising one finger and one hook. It is obvious, however, that my invention is not limited to a twill weave nor to reversals or interruptions of the indications given by a bar of chain 41 to a single hookY and a single finger. Thus, for instance, any weave which happens to include a bar similar to bar v on shaft 82, together with their attendant links, can be duplicated without departing from the spirit of my invention to meet the conditions of weaves otherthan the twill weave described.

From the foregoing it will be seen that I have provided simple mechanism for altering the harness indication given by the pattern chain for one pick of the loom and cause it in effect to be a duplicate of the indication normally occurring for the following pick. For those hooks which would normally be down but which must be raised at the interruption I provide a lifter, and for those fingers which would normally ber down but which must be raised to effect lowering of their hooks I provide a depressor suchy as the link 9| the effect of which is tov reverse the normal position of the associated lifter hook. It will further be understood that my invention is not limited to the-use Vof four harness frames nor to the cancellation of the indications given to two lifter hooks. The third pick following the two picks specifically described hereinbefore follows in normal order after the second pick and for this reason there is no interruption or offsetting of the diagonal twill lines in the fabric. Also, the mechanism which effects a reversal is controlled directly from the box chain and although this is a convenient means for operating my invention I do not wish necessarily to be limited to it. It is sufcient if the reversal of the pattern indication occurs when the corded weft is called into action.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without l. In a loom.l harness frames movable in a given sequence during loom operation to produce a succession of warp sheds including two different sheds, a part having a motion incident to loom operations-a pattern chain for the harnesses to give different indications at one pick intervals corresponding to the warp sheds of said sequence and including two groups of different indications, one for each of said two successlve differentwarp sheds, operating mechanism between the pattern chain and the harnesses controlled by the pattern chain to cause said harnesses to move according to said sequence and form said two successive different warp sheds, and mechanism operated by said part and oonnected to said operating mechanism to alter the control exercised by one of said groups of indicators over its corresponding Warp shed to cause the latter to be similar to the other of said two successive warp sheds.

k2. In a loom operating with a set of harnesses movable during two successive picks of the loom to produce two different successive warp sheds, a part having a motion incident to loom operations, a pattern chain for the harnesses, operating mechanism for the harnesses controlled by the chain and normally caused by the latter to move said harnesses to form said two different warp sheds, and mechanism operated by said part to alter the operation of said operating mechanism as normally determined by said pattern chain and cause said operating mechanism to make both of said two successive warp sheds alike..

3. In a loom having shifting shuttle box mechanism and operating with a set of harnesses which shift every pick of the loom in a sequence to produce a succession of different warp sheds, a pattern chain for the harnesses movable regularly during loom operation and having groups of indicatingT elements corresponding to the different warp sheds, one group for each shed, operating mechanism for the harnesses effective under control oi the groups of said indicating elements of the pattern chain to cause said harnesses to form said successive sheds in said sequence, and means operated by said shifting shuttle box mechanism when the latter shifts to cause said operating mechanism to alter the controlexercised by the group of .indication elements corresponding to said given pick and cause the corresponding warp shed to be similar to the next following warp shed.

Il. In a loom operating with shifting shuttle boxes having two shuttles and wherein harness frames shift every pick of the loom to produce successive warp sheds in a given sequence, a pattern chain having indicating elements arranged in rows which become progressively effective to control the harnesses, the indicating elements of each row corresponding to the normal position of the harness frames for the corresponding shed, operating mechanism controlled by the pattern chain and caused by said rows as the latter become progressively effective to shift theV harness frames to produce warp sheds according to said sequence when one of said shuttles is active, and means operative when the other shuttle becomes active to alter the control effected by the row of indicating elements corresponding to the pick on which said other shuttle becomes active to interrupt the sequence and move said harness frames to the position they normally occupy during the following pick, thereby producing two successive identical warp sheds.

5. In a loom having harness frames which shift every pick of the loom to form successive warp sheds in a given sequence, a pattern chain to determine the normal succession of warp sheds in said sequence and comprising bars each having pegs, each bar being movable to indicating position and controlling two successive warp sheds, fingers each normally in down nonindicating position but raised by a peg thereunder to indicating position, lifter hooks each positioned by a finger and operatively connected to a harness frame, each hook being in indicated or non-indicated position depending upon whether the corresponding finger is in indicated or non-indicated position, a lifter knife to engage the hooks in indicatedposition to lift the corresponding harness frames, a shifting shuttle box mechanism, and means controlled by the shifting shuttle box mechanism when the latter shifts including devices to raise a normally down finger and lift` a hook in indicated position out of the path of the knife to interrupt the sequence of warp sheds and cause both warp sheds controlled by the chain bar in indicating position to be the same.

6. In a double index dobby loom having a set of harness frame units each having an upper and a lower lifter hook, actuator knives, one for the upper hooks and the other for the lower hooks, said knives operating in a two-pick cycle in which the lower knife has a working stroke on the first pick and the upper knife has a working stroke on the second pick, a pair of positioning fingers for the hooks of each unit, one iinger of each pair for the top hook and the other finger of the pair for the bottom hook of the corresponding unit, a pattern chain bar having two rows of indicators to control two successive warp sheds, each row consisting of indicating elements and blankareas, one of said rows for the ngers of the bottom hooks and the other row for the fingers of the top hooks, certain of said indicators being positioned to cause the lower hook of the corresponding unit to be in the path of the bottom knife and the upper hook of the same unit to be out of the path of the top knife, other of said indicators causing the lower hook of another unit to be out of the path of the bottom knife and the upper hook of said other unit to be in the path of the top knife, and means controlled by the loom to reverse the relation of the bottom hooks corresponding to said certain and said other of said indicators with respect to the path of the bottom knife and thus cause said two successive warp sheds to be identical.

7l. In a double index dobby loom havinga set of harness frame units each having an upper and a lower lifter hook, actuator knives, one for the upper hooks and the other for the lower hooks, said knives operating in a two-pick cycle in which the lower knife has a working stroke on the rst pick and the upper knife has a working stroke on the second pick, a pair of positioning fingers for the hooks of each unit, one iinger of each pair for the top hook and the other finger of the pair for the bottom hook of the corresponding unit, a pattern chain bar having two rows of indicators to control two successive warp sheds, each row consisting of indicating elements and blank areas, one of said rows for the fingers of the bottom hooks and the other row for the fingersv of the top hooks, certain of said indicators being positioned to cause the lower hook of one unit to be in the path of the bottom knife and the upper hook of the same unit to be out of the path of the top knife, other of said indicators causing the lower hook of another unit to be out of the path of the bottom knife and the other hook of said other unit Vhook into the path of the bottom knife, thereby to be in the path of the top knife, means to move the 'chain bar to control position, a member having a movement coincident with movement Y of the chain bar to control position, and means operated by vsaid member when the latter has said f' Vmovement to reverse the relation of the bottom hooks of said one and said other unit with respect to the bottom knife, thus causing said two successive Warp sheds to be identical. 1 8 In a double index dobby loom having a set of harness frame units each having an upper and a lower lifter hook, actuator knives, one for the rupper hooks land the other for the lower hooks, said knives operating in a two-pick cycle in which the lower knife has a working stroke on the first pick and the upper knife has a working stroke on the second pick, a set of positioning fingers for the top hooks and another set of positioning fingers for the bottom hooks, a pattern chain bar having two rows of indicators to control two successive warp sheds, each row consisting of indicating elements and blank areas, one of said rows for said one set of fingers and the other row for said other set of fingers, certain of said indicators being positioned to cause the lower hook of one unit to be in the path of the bottom knife and the upper hook of the same unit to be out of the path of the top knife, other of said indicators causing the lower hook of another unit to be out of the path of the bottom knife and the top hook of said other unit to be in the path of the top knife, and simultaneously acting means controlled by the loom operating prior to the beginning of the working stroke of the bottom knife to move the bottom hook of said one unit out of the path of the bottom knife and effect movement of the bottom hook of said other unit into the path of said bottom knife, thus causing both of the two successive warp sheds to be the same.

9. In a double index dobby loom having a set of harness frame units each having an upper Y and a lower lifter hook, actuator knives, one for the upper hooks and the other for the lower hooks, said knives operating in a two-pick cycle in which the lower knife has a working stroke on the first pick and the upper knife has a working stroke on the second pick, positioning fingers for said hooks, said fingers arranged in pairs, one pair for each unit, one finger of each pair for the top hook and the other finger of the pair forrthe corresponding bottom hook, a pattern chain bar having two rows of indicators to control two successive warp sheds, each row consisting of indicating elements and blank areas, each finger when down causing the corresponding hook to be out of the path of the knife therefor and each finger when raised causing the corresponding hook to be in the path of the knife therefor, one of said rows for the fingers of the bottom hooks and the other row for the fingers of the top hooks, certain of said indicators positioning certain fingers to cause the lower hook of one unit to be in the path of the bottom knife and the upper hook of the same unit to be out of the path of the top knife, other of said indicators positioning other lingers to cause the lower hook of another unit to be out of the path of the bottom knife and the other hook of said other unit to be in the path of the top knife, and simultaneously acting means operating prior to the working stroke of the bottom knife to move the bottom hook of saidone unit out of the path of the bottom knife and raise Vthe finger corresponding to the lower hook of said other unit to effect movement of the last Ynamed knife having 'a working stroke on the second 'pick of the loom for actuation of the top hooks,

a chain bar having two rows o-f pattern indicaltors, positioning fingers intermediate the chain bar and the Vhooks lto position the latter according to the location of the indicators on said chain bars, one of said rows positioning certain of the positioning elements to cause the bottom hooks of selective units to be inthe path of the bottom knife, the second row causing the positioning elements therefor to effect movement of the top hooks of said selected units out of the path of the top knife, and means acting irrespective ofthe position of the indicators of the first row to cause the bottom hooks of the selecting units to assume the same position with respect to the path of the bottom knife as is assumed by the corresponding top hooks with respect to the path of the top knife, either, in or out of the bottom knife path.

11. In a double index dobby loom having a set of harness units each including a top and bottom hook, a bottom knife having a working stroke on one pick of the loomgfor actuation of the bottom hooks, a top knife having a working stroke on the second pick of the loom for actuation of the top hooks, a pattern chain bar to give indications for two successive picks of the loom, positioners for the hooks controlled by the pattern chain bar effective to relate the hooks of said units to their respective knives differently for the two successive picks, and mechanismacting independently of the position of the lower positioners as determined by the row of indicators therefor to cause the bottomhook of a given unit to move out of the path of the bottom knife provided the top hook of the same unit is out of the path of the top knife and simultaneously cause the bottom hook of another unit to move into the path of the bottom knife provided the top hook of said other unit is in the path of the top knife.

l2. In a double index dobby loom having a set of harness frame units each having a top and bottom hook, a bottom actuator for the bottom hooks having a working stroke on one pick of the loom, a top actuator for the top hooks having a working stroke on the next pick of the loom, means to indicate the top hooks of certain units for operation and indicate the top hooks of certain other units for non-operation by the top actuator and indicate the bottom hooks of said certain units for non-operation by the bottom actuator and indicate the bottom hooks of said certain other units for operation by said bottom actuator, a part having a motion incident to loom operation, and mechanism operated by said part to cause the top and bottom hooks of each unit to bear the same relation with respect to their corresponding actuators when the latter have two successive working strokes, either for operation or non-operation thereby.

13. In a double index dobby having a pattern chain bar in indicating position provided with successive picks of the loom and the first row of pegs being for the first Dick and the second roW of pegs being for the second pick, top and bottom lifter knives moving in given Working paths, one knife on one pick and the other knife on the second pick, top and bottom lifter hooks movable into and out of said top and bottom paths, respectively, a finger for each hook extending over and positioned by said pattern chain bar, any nger over a peg effecting movement of the corresponding hook into the knife path therefor and any finger over a non-pegged part of the bar being in normal down position to position the corresponding hook above the knife path therefor, the pegs of each row being in different positionswith respect to their lingers from the pegs of the other roW with respect .to the fingers for the latter pegs, and means including a lifter for at least one finger and a lifter for at least one hook other than the hook corresponding to the last named finger to cause said hooks during one of said picks to assume the same position with respect to their knives which they have during the other pick regardless of the 'position of the pegs corresponding to said one row.

ALLAN S. HUTCHINS. 

